Corner construction



1933. G. E. BOMBERGER 0? CORNER CONSTRUCTION Filed Oct. 11, 1930 Fig.1

A TTORNEYS.

Patented Aug. 8, 1933 UNETED STATES PATENT GFFICE CORNER CONSTRUCTION George E. Bomberger, Indianapolis, Ind., assignor to Inland Container Corporation, Indianapolis,

a Corporation This invention relates to a relatively moisture tight corner for cartons formed of paperboard, such as corrugated fiber or solid fiber'or boxboard.

The chief objector the invention is to provide corner construction for boxes and the like is relatively moisture tight, not only for the purpose of keeping moisture out but primarily for the purpose of preventing evaporation of moisture from the box contents, and which also is sift proof.

In present day boxes formed of the material .i ore mentioned, it is customary to provide a sic-t of appreciable width between two extensions 1" a sheet of stock, which slot is in longitudinal lignment with scoring that provides the hinge tween two adjacent sides of the box. The top ges or" these two meeting sides are defined by ransverse scorings which form the hinges between the extensions and sides. The slot beextensions, which is of appreciable extends from the remote edge of the exto the intersection of the two transveise scorings. When the portions of the sheet "olded into three transverse planes for corrrnation there results an appreciable opent the corn r which permits the escape of are from cox contents and which perthe entrance of moi ture or vapors to the cor -ts oi the box rom without the same. The age or" loss in the packaging of soap from c of packaging to the time of opening the .he housewife is appreciable.

pany, of Cincinnati, Ohio, have guaranteed their employees a full years work. To maintain even working schedule in this soap-making ant, spite of the seasonal soap demands by the public,

clatively large storage of soap supmaintained at the slack depresent invention eliminates the formaof the corner opening and for s a subtia" moisture proof This corner reducing the spacing or slot be two adjacent extensions to a minid inther, by terminating this spacing or or" the intersection of the two trans- GISSCO1J1S and completing the separation ben the two extensions by a slit separation instead or" a slot separation. As a result of the aforesaid each extension adjacent to the slit is provided with a sidewardly directed tongue and said tongues overlap each other and form a relatively moisture-proof corner, and furthermore, said tongues form a reinforcedicorner.

A modified form of the invention includes the relatively narrow slot terminating short of the transverse scorings and the addition of a slit substantially transverse to the slit and of a length substantially equal to the distance between the end of the slot and the intersection of the scorings. 7

Other objects and features of the invention will be understood from the accompanying drawing and the following description and claims:-

in the drawing Fig. 1' is a plan View of a portion of a blank suitable for box formation, scored and slotted for corner formation and embodying the invention. Fig. 2 is the top plan View of a portion of a box showing the near side and its extension in normal or corner forming position and the adjacent overlapping extension in vertical alignment with its supporting side. Fig. 3 is a simti view of the same parts but in corner forming on. i Fig. 4 is a perspective view of the cornor of box showing the imperforate corner arrangement.

Fig. 5 is a View similar to Fig. 1 but on asmaller scale.

Fig. 6 is a top plan view of one of the ends positionedin corner relation and the other remaining extended, the same corresponding to that shown in Fig. 2.

F 7 is a top plan view'of a corner of the box and .crresponds to that shown in Fig. 3.

Fig. 8 is a top plan viewoi a corner of a modifled form of box utilizing the blank shown in Fig.

5 but reversing the fold.

In the drawing 10 indicates one portion of the ..l eet oi paperboard or the like, connected to anportion 11 by a scoring 12. The scoring 12 the hinge between the two portions 10 and 11 which form the adjacent sides of the box. Each 10 and 11 terminates in a transversescoring 13, and integral and hingedly connected L l0 and 11 are the extensions 14 and Wtively. These extensions 14 and 15 are ependent of each other and are nor- 'ated throughout a considerable portheir-length by a slot indicated at 16, which slot is of considerably lesswidth than that at present employed in the art.

The slot 16 at 17 terminates short of the transverse scoring 13 and in this respect the present invention also differs from the prior art. The scoring 12 is extended as at 18 and said scoring 18 is in alignment with the slot 16 and the scoring 12, the scoring 18 meeting slit as at 19, and said slit terminates at the transverse scoring 13.

When the two extensions are arranged in overlapping relation, the two sides 10 and 11 are arranged in rectangular relation and the overlapping portions are arranged in rectangular relation relative to their respective supporting sides. Then the inner tongue 20 engages in the groove or scoring 13 at the corner and the outer tongue 20 overlaps the junction to a slight degree and if there is any misalignment in the formation or final securing o; the sides together in the box formation, the outer tongue 20 covers the corner and forms an effective seal at the corner with the iner tongue 20. Actual test by weight measurement of box contents such as soap has demonstrated that this corner is substantially moistureproof to the extent of preventing the evaporation of moisture from the box contents and for such a period of time required to store surplus supplies of material such as soap and the like.

In gs. 5 to 7 inclusive, there is illustrated a modified form of the invention.

110 indicates one side in said figures, 111 an adjacent side, the two being hingediy connected together by a scoring 112. A flap or side forming extension 114 and a similar flap 115, are hingedly connected to the respective sides 110 and 111 by the scoring 113, which is transverse to the scoring 112.

In 8 is illustrated a slightly modified form of box corner. This is a reversal of that shown in Fig. 7. In Fig. 8 the three outside faces of the box at the corner are flat or smooth, for the folded portion is upon the inside, whereas in Fig. 7 the three inside faces of the box at the corner are fiat or smooth. The ultimate use of the box will determine which fold is preferred.

Herein a relatively narrow slot 116 extends from the end of the extensions from the same toward the intersection of the transverse sccrings 112 and 113 and is in alignment with the scoring 112 but terminates short of said intersection. Ex-

tending transversely of said slot 116 is a transverse slot 119, which likewise is transverse to the scoring 118, which is a continuation of scoring 112 and extends from the intersection of the transverse scorings to the end of the slot 116. The end 115 is folded inwardly at right angles to the side 110 after the sides 110 and 111 are arranged in substantially corner formation. This position is shown in Fig. 6 and in this figure, the flap 114 is shown extending in vertical align" ment with the side 110 which supports the same. In this folding movement, the diagonal creasing 120 occurs, which extends from the intersection of the transverse scorings to the termination of the slit 119. The slit 119 is of a length substantially equal to the distance between the intersection of the transverse scorings and the end of the slot 116. After this folding movement takes place, the other end or flap extension 114 is folded so as to lie transversely to its supporting side and parallel to the other flap or extension 114. It can be readily recognized-see Fig. 7-that there results a moisture tight look at the corner and also that the corner is multiply reinforced by the stock which also serves as a'protection as well as doubling the strength thereof.

The type of corner illustrated in Figs. 5 to 7 inclusive, is one that is moisture proof or air tight and is also sift proof and is one that is particularly adaptable to thinner weights of stock. The form of the invention illustrated in Figs. 1 to 4 inclusive, is readily adaptable to heavier weights of stock.

The invention claimed is:

1. A corner construction formed from sheet material of corrugated board type having a scored portion therebetween for forming hinge extensions for each wall, the adjacent extensions being separated from each other by a relatively narrow space extending from the end of the extension toward the intersection of the scorings but terminating short thereof, said first mentioned scoring being longitudinally aligned with the spacing and extending to meet the same, and a slit extending completely through the board and transversely of one of the scorings and the space and for a distance substantially equal to the distance from the end of the spacing to the intersection of the transverse scorings, whereby, when the extensions are overlapped in rectangular relation relative to each other and rectangularly positioned relative to the supporting side wall, there is formed a moisture and air-tight and sift proof corner in a corrugated board structure.

2. A moisture proof corner construction formed 'rom sheet material of corrugated board type, transversely scored for forming side walls and end extensions, the end extensions including a relative narrow space therebetween and extending from one end of the sheet to substantially the intersection of the transverse scorings but terminating short thereof, said sheet having a slit extending completely through the board and transversely of said spacing and the scoring and extending from the end of the spacing an amount equal to the distance between the end of the spacing and the intersection of the transverse scorings, said side walls and extensions being arranged for transverse positioning with the extensions transversely overlapping for forming a moisture proof corner between the several side walls, the material included within the triangle defined by the scoring from the intersection of the transverse scorings and the end of the spacing and the transverse slit being doubled upon itself along the diagonal for forming a multiple reinforced moisture proof and air tight and sift proof corner in a corrugated board structure.

3. A corner construction formed from sheet material of corrugated board type, having a scored portion therebetween for forming a hinge and transverse scoring in alignment for forming a pair of aligned hinge extensions one for each wall, the adjacent extensions being separated from each other by a relatively narrow space extending from the end of the extensions toward the intersectionof the scoring but terminating short thereof, said first mentioned scoring being longitudinally aligned with said spacing and being longitudinally extended to meet the same, a slit extending entirely through the board from the base of the spacing and transversely thereof a distance substantially equal to the distance between the end of the spacing and the intersection of the transverse scoring, the portions associated with said slit being arranged for multiple overlapping whereby, when the extensions are overlapped in rectangular'relation relative to each other and rectangularly positioned relative to the supporting side wall, there is formed a moisture and air-tight and sift proof corner in a corrugated board structure.

GEORGE E. BOMBERGER. 

